(19)
(11) EP 4 530 057 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.06.2025 Bulletin 2025/25

(43) Date of publication A2:
02.04.2025 Bulletin 2025/14

(21) Application number: 25152119.1

(22) Date of filing: 04.07.2023
(51) International Patent Classification (IPC): 
A43B 13/12(2006.01)
B29D 35/14(2010.01)
 B29D 35/12(2010.01)
(52) Cooperative Patent Classification (CPC):
A43B 13/125; B29D 35/122; B29D 35/142
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 12.07.2022 US 202263388523 P

(62) Application number of the earlier application in accordance with Art. 76 EPC:
23183273.4 / 4309537

(71) Applicant: PUMA SE
91074 Herzogenaurach (DE)

(72) Inventors:
  • HARTMANN, Matthias
    91301 Forchheim (DE)
  • SUSSMANN, Reinhold
    91443 Scheinfeld (DE)

(74) Representative: Gosdin, Carstensen & Partner Patentanwälte Partnerschaftgesellschaft mbB 
Adam-Stegerwald-Straße 6
97422 Schweinfurt
97422 Schweinfurt (DE)

   


(54) METHOD OF MANUFACTURING A TUNABLE MIDSOLE FOR AN ARTICLE OF FOOTWEAR


(57) A method of making a midsole includes selecting a plurality of yarns. At least two yarns of the plurality of yarns have different properties relative to one another. The method further includes bundling the plurality of yarns to form a bundled yarn structure and intertwining the bundled yarn structure to form a twisted yarn structure. Further, the method includes depositing the twisted yarn structure into a first mold within an autoclave and applying a supercritical fluid to the twisted yarn structure. The method further includes supercritical fluid infiltrating and saturating the twisted yarn structure, depressurizing the autoclave to cause a foaming process therein to convert the twisted yarn structure into an anisotropic foam blank, and depositing the anisotropic foam blank within a second mold that is configured as a midsole for an article of footwear.







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